body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f3f4f6;
    margin: 0;
    padding: 0;
}
header {
    background-color: #007acc;
    color: white;
    padding: 20px 0;
}
header h1 {
    margin: 0;
}
header p {
    margin: 10px 0 0;
}
main {
    padding: 20px;
}
.flashcards-section {
    margin: 20px 0;
}
.flashcards-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
}
.flashcard {
    background-color: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 300px;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    cursor: pointer;
    transition: transform 0.3s;
}
.flashcard:hover {
    transform: scale(1.05);
}
.hidden {
    display: none;
}
footer {
    background-color: #007acc;
    color: white;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}